| 波前像差引导的角膜切削模型及实现技术的研究 |
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| 引用本文： | 叶寒,廖文和,沈建新.波前像差引导的角膜切削模型及实现技术的研究[J].光学精密工程,2004,12(1):31-36. |
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| 作者姓名： | 叶寒 廖文和 沈建新 |
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| 作者单位： | 南京航空航天大学,机电学院,江苏,南京,210016;南京航空航天大学,机电学院,江苏,南京,210016;南京航空航天大学,机电学院,江苏,南京,210016 |
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| 基金项目： | 江苏省高技术研究计划资助(No.BG2002012),"十五"国家计委产业化项目(计产业:[2002]1329号) |
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| 摘 要： | 对波前像差概念和表示方法做了必要的叙述,深入研究了波前像差引导的角膜个性化切削模型,推出了角膜手术区域中角膜修正量的基本公式,给出了实现个性化像差矫正手术的软硬件框图.采用该模型引导的扫描频率为120Hz,光斑直径为0.9mm的准分子激光眼科治疗机做PMMA试验,对比传统的屈光不正矫正模型,在手术区域直径为6.5mm条件下,给出了近视、远视、近视散光各种情况下手术的最大切削深度和切削时间.试验结果表明,各种情况下角膜最大切削深度基本相同,波前像差矫正切削模型的切削时间稍大,PMMA板切削效果良好.
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| 关 键 词： | 激光角膜切除术 波前像差 模型 眼球跟踪系统 |
| 文章编号： | 1004-924X(2004)01-0031-06 |
| 收稿时间： | 2003/11/21 |
| 修稿时间： | 2003年11月21 |
Wavefront guided ablation on cornea |
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| YE Han,LIAO Wen-he,SHEN Jian-xin.Wavefront guided ablation on cornea[J].Optics and Precision Engineering,2004,12(1):31-36. |
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| Authors: | YE Han LIAO Wen-he SHEN Jian-xin |
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| Affiliation: | College of Mechanical and Electrical Engineering Nanjing University of Aeronautics &; Astronautics, Nanjing 210016, China |
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| Abstract: | The customized ablation based on the individual eye's wavefront aberrations and the ablation depth in corneal zone were studied and the hardware and software used for wavefront aberrations were developed for refractive surgery. According to this model, a scanning-spot laser with a 1.0 mm spot size and a 200 Hz repetition rate were used. Under the condition that the treatment area diameter is 6.5 mm, the PMMA result to myopia, hyperopia, astigmatism is that the maximal depth is equal and the time needed is a little bigger than the refractive errors of guided Lasik model, the result shows that the wavefront guided Lasik model is acceptable. |
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| Keywords: | laser keratotomy wavefront aberration model eye tracking system |
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